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The morphology of walls of syncytia induced by Nacobbus aberrans in tomato roots has been examined by scanning electron microscopy after digesting out the cytoplasm from the cells. A clear boundary exists between the gall cells which surround the syncytium and the transformed cells. Syncytial cells are interconnected by perforations through their walls; these perforations are numerous and are frequently round or oval in shape. Wall ingrowths are absent. The structure of these syncytia is compared with those induced by other endoparasites.

Affiliations:
1: Department of Developmental Biology, Research School of Biological Sciences, Australian National University, Canberra, A.C.T. 2601, Australia